David Kellenberger

Vice President | S Ventures at SentinelOne

📍 San Francisco, California, United States🔄 Updated September 2026💼 26 investments📅 15 years investing🗓 Last invested Jan 2026
VC🌍 United States20+ investments
26
Total investments
2
Early stage
9
Mid stage
9
Late stage
15y
Years active

Portfolio

24 investments · sorted by recency
All investments
Early stage
Mid stage
Late stage
Investor
2026
Together AI is the AI Native Cloud, purpose-built for AI engineers and researchers with a full suite of tooling across inference, model shaping, and pre-training. AI natives can use Together AI as a full-stack AI platform — from a high- performance inference engine built for reliable and fast scaling to on-demand GPU clusters and massive-scale AI factories. Together AI continuously pushes the frontier forward by productizing cutting-edge research from our world-leading AI systems research team. By combining research velocity with production-grade infrastructure, we enable companies to reliably scale AI-native applications as fast as the field evolves. Trusted by leading AI natives like Cursor, Decagon, Eleven Labs, AI21, Hedra, and Cartesia, as well as SaaS innovators such as Salesforce, Zoom, and Zomato, Together AI powers the next generation of AI-native applications.
Investor
2025
Quantum computing will be a world-changing technology with the potential to unlock powerful advances in medicine, energy, finance and beyond. At PsiQuantum, we’re focused on building the world’s first useful quantum computer. A useful quantum computer requires at least 1,000,000 qubits and error correction. We believe photonics is the only path to building a useful quantum computer. Our team at PsiQuantum is a mix of quantum physicists, semiconductor, systems, and software engineers, system architects and more. Error correction is at the centre of everything we do; and we focus on solving real-world problems. If you’re interested in joining our team, we are always open to hearing from exceptional people interested in working on one of the defining technologies of our lifetime.
Investor
Oct 2024
Galileo is the leading platform for enterprise GenAI evaluation and observability. Our comprehensive suite of products support builders across the new AI development workflow—from fine-tuning LLMs to developing, testing, monitoring, and securing their AI applications. Each product is powered by our research-backed evaluation metrics. Today, Galileo is used by 100s of AI teams from startups to Fortune 50 enterprises, including Twilio, Comcast, and HP.
Investor
2024
We build the models. You build the future. AGI for the enterprise, starting with software agents.
Investor
2024
Were an AI research company that builds reliable, interpretable, and steerable AI systems. Our first product is Claude, an AI assistant for tasks at any scale. Our research interests span multiple areas including natural language, human feedback, scaling laws, reinforcement learning, code generation, and interpretability.
Investor
2023
Cohere is the leading security-first enterprise AI company. We build cutting-edge foundation models and end-to-end AI products designed to solve real-world business problems. We partner closely with companies to deliver seamless integration, full customization, and easy-to-use solutions for their workforce and customers. Our all-in-one platform offers enterprises the highest levels of data security, privacy and optionality to deploy across all major cloud providers, private cloud environments, or on-premises. HQ: 171 John Street, 2nd Floor, Toronto, ON M5T 1X3
Investor
2022
In aerospace, nothing launches without verification. Drata applies that same mission-grade discipline to business trust—so it’s always ready before the moment of launch.
Investor
2022
At WorkRamp, we believe that the best companies grow through learning. That’s why hundreds of market leaders such as Box, Lattice, and Outreach choose the Learning Cloud to power employee and customer learning. Boost employee performance, grow revenue, and scale customer success with WorkRamp. Learn more by visiting workramp.com.
Investor
2021
Klue is an AI-powered Competitive Enablement platform designed to help product marketers collect, curate, and deliver actionable competitor insights to empower revenue teams to win more business. Klue enables enterprise sales teams to win more business by providing dynamic insights about competitors. The platform uniquely brings together external competitive intel and internal knowledge from your team in the field. Then, makes it easy for Sales to access the information wherever they are. Built by product marketers to give organizations the advantage in every competitive environment. We obsess about your competition so you dont have to.
Investor
2021
TRM Labs is a blockchain intelligence company that helps financial institutions, crypto businesses, and government agencies detect and investigate crypto-related financial crime and fraud. Every day, we tackle challenges in data engineering, data science, and threat intelligence to advance our mission to build a safer financial system for billions of people.  Attention Job Applicants: Recently, it has come to our attention that certain individuals are masquerading as members of TRMs recruitment and human resources team online. We will never request your personal information outside of the standard recruitment process. Every job offer at TRM is extended only after a formal interview process and we will not require candidates to fulfill any financial obligations as part of the hiring process. If you believe you have been targeted with a fraudulent job offer or encountered any suspicious activity, please send us an email with “Recruitment Fraud” in the subject line to recruiting-fraud@trmlabs.com.
Investor
2020
**Snowflake is proud to be the Official Data Collaboration Provider for LA28 and Team USA.** Snowflake delivers the AI Data Cloud — a global network where thousands of organizations mobilize data with near-unlimited scale, concurrency, and performance. Inside the AI Data Cloud, organizations unite their siloed data, easily discover and securely share governed data, and execute diverse analytic workloads. Wherever data or users live, Snowflake delivers a single and seamless experience across multiple public clouds. Snowflake’s platform is the engine that powers and provides access to the AI Data Cloud, creating a solution for data warehousing, data lakes, data engineering, data science, data application development, and data sharing. Join Snowflake customers, partners, and data providers already taking their businesses to new frontiers in the AI Data Cloud.
Investor
2020
Outreach is the only complete AI Revenue Workflow Platform built for all revenue teams. Outreach infuses predictive, assistive, conversational, and agentic AI to power hundreds of use cases across revenue motions. From new logo prospecting to expansions, deal acceleration, driving retention, and forecasting, Outreach AI automates workflows and frees sellers to focus on more strategic conversations and actions. Revenue leaders benefit from connected account visibility, performance insights, and higher forecasting accuracy across every GTM team. World leading enterprise organizations use Outreach to power their revenue teams, including SAP, Siemens, Snowflake, ZoomInfo, and Verizon to name a few. To learn more, please visit www.outreach.io. Outreach is the only company to offer sales engagement, revenue intelligence, and revenue operations functionalities in a unified platform. More than 5,500 companies, including Zoom, Siemens, Okta, DocuSign, and McKesson depend on Outreach to power their revenue organizations. Outreach is a privately held company based in Seattle, Washington, with offices worldwide. To learn more, please visit www.outreach.io.
Board Observer
2019
Kooltra is a worldwide leader in end-to-end foreign exchange and global payments infrastructure. The Kooltra Core Platform empowers financial institutions with scalable technology that accelerates revenue growth, reduces operating costs, streamlines compliance, and automates regulatory reporting. By bringing employees and customers together on a single cloud-based platform, the digital experience is optimized. This results in streamlined customer onboarding, dealing, settlements & multi-currency payments with a transparent view for each department into the customer and transaction lifecycle. The Kooltra platform allows your business to - Accelerate Growth with Business Insights - empower business and IT users to rapidly create reports and dashboards to extract actionable insights and measure KPIs, driving informed decision-making and strategic planning Launch a Digital Customer Offering - allow your customers to self onboard and to use your services via web or mobile. Reduce operating costs while delivering customer success and driving revenue growth Optimize Workflows - reduce errors and enhance efficiency by digitizing your workflows for operating your foreign exchange business while continuously driving towards automation Enhance Risk Controls - proactively mitigate risk with real time visibility and sophisticated tools, including the ability to prevent unwanted transactions before they happen Achieve Compliance Best Practices - ensure adherence to regulatory requirements and industry standards, reducing the risk of non-compliance penalties Learn more at kooltra.com. Don’t get left behind.
Investor
2019
As of August 7, 2020, ThousandEyes is a part of Cisco. ThousandEyes delivers visibility into digital experiences delivered over the Internet. The world’s largest companies rely on our platform, collective intelligence and smart monitoring agents to get a real-time map of how their customers and employees reach and experience critical apps and services across traditional, SD-WAN, Internet and cloud provider networks. ThousandEyes is central to the global operations of the worlds largest and fastest growing brands, including 360+ of the Global 2000, 170+ of the Fortune 500 and 10 of the 10 top US banks.
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Experience · 28 entries
All (28)
Investments (26)
Board (3)
2026
Investor
2026
Together AI is the AI Native Cloud, purpose-built for AI engineers and researchers with a full suite of tooling across inference, model shaping, and pre-training. AI natives can use Together AI as a full-stack AI platform — from a high- performance inference engine built for reliable and fast scaling to on-demand GPU clusters and massive-scale AI factories. Together AI continuously pushes the frontier forward by productizing cutting-edge research from our world-leading AI systems research team. By combining research velocity with production-grade infrastructure, we enable companies to reliably scale AI-native applications as fast as the field evolves. Trusted by leading AI natives like Cursor, Decagon, Eleven Labs, AI21, Hedra, and Cartesia, as well as SaaS innovators such as Salesforce, Zoom, and Zomato, Together AI powers the next generation of AI-native applications.
2025
Investor
2025
Infleqtion, Inc. (NYSE: INFQ) is a global leader in quantum technology, delivering neutral atom solutions for quantum computing, networking, sensing, and security. With a product portfolio spanning quantum computers, quantum optical clocks, RF receivers, and inertial sensors, Infleqtion’s full-stack approach combines high-performance hardware with the company’s proprietary Superstaq quantum computing software platform. Infleqtion’s systems are already in use by the U.S. Department of War, NASA, the U.K. government, and in multiple collaborations with NVIDIA. Infleqtion, in collaboration with NVIDIA, published the world’s first demonstration of a materials science application using logical qubits. With operations in the U.S., Europe, and Asia, Infleqtion meets the demands of government and commercial customers across the space, defense, energy, finance and telecommunications sectors.
Investor
2025
Quantum computing will be a world-changing technology with the potential to unlock powerful advances in medicine, energy, finance and beyond. At PsiQuantum, we’re focused on building the world’s first useful quantum computer. A useful quantum computer requires at least 1,000,000 qubits and error correction. We believe photonics is the only path to building a useful quantum computer. Our team at PsiQuantum is a mix of quantum physicists, semiconductor, systems, and software engineers, system architects and more. Error correction is at the centre of everything we do; and we focus on solving real-world problems. If you’re interested in joining our team, we are always open to hearing from exceptional people interested in working on one of the defining technologies of our lifetime.
2024
Investor
Oct 2024
Galileo is the leading platform for enterprise GenAI evaluation and observability. Our comprehensive suite of products support builders across the new AI development workflow—from fine-tuning LLMs to developing, testing, monitoring, and securing their AI applications. Each product is powered by our research-backed evaluation metrics. Today, Galileo is used by 100s of AI teams from startups to Fortune 50 enterprises, including Twilio, Comcast, and HP.
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Investment activity
2011–2026 · 26 investments
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